The videos that she mentions (“those involved in the legal proceedings”) are the 12 “temporarily uploaded music videos” that GEMA sued YouTube over in 2010. GEMA wanted to force YouTube to install filters to keep copyrighted material off YouTube, and it won the case. A German judge ordered that Google had to install filters to prevent prevent users from uploading content from artists whose rights GEMA holds.

So it appears that Kim Dotcom’s video might have been taken down, but not by GEMA.